Loom shuttle



Aug. 19, 1941. p N R 2,252,819

' LOOM SHUTTLE Fi led Nov. la -1939 7 I g klcspezcen a 9 a 15% Patented Aug. 19, 1941 UNITED STATES PATENT OFFIQE LOOM SHUTTLE rhilip L. Spencer, Millbury,

Watson-Williams Mass, assignor to Manufacturing Company,

7 Claims.

This invention relates to loom shuttles of the type in which the bobbin is mounted on a pivoted spindle.

It is the general object of my invention to provide improved means for holding a bobbin securely on a shuttle spindle when the spindle is lowered to running position but allowing easy removal of the bobbin when the spindle is raised.

A further object of my invention is to simplify the construction and reduce the number of parts in such devices, with resultant and important savings in time, labor and material.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Preferred forms of the invention are shown in the drawing, in which Fig. 1 is a partial plan view of a shuttle with my improvements embodied therein;

Fig. 2 is a side elevation of the same portion of the shuttle, but partly in section along the line 2-2 in Fig. 1;

Fig. 3 is a side elevation, partly in section, of the corresponding portion of the shuttle blank;

Fig. 4 is a transverse sectional view, taken along the line 4-4 in Fig. 3;

Fig. 5 is a partial side elevation of a shuttle spindle;

Fig. 6 is a side elevation of a bobbinholding spring;

Fig. '7 is a plan view of the spring, looking in the direction of the arrow 1 in Fig. 6;

Figs. 8 and 9 are transverse sectional views, taken along the lines 8--8 and 9-9 in Fig. '7 respectively; and

Fig. 10 is a plan view of a slightly modified construction.

Referring to the drawing, I have shown one end portion of a shuttle blank ID having the usual longitudinally extending central recess H to receive a bobbin B. The recess H is also extended toward one end of the shuttle as indicated at I2 and I4 in Fig. 3, the portion I being slightly narrower and deeper than the portion [2 for purposes to be described.

The shuttle blank It] also has a longitudinal slot l5 overlying the recesses l2 and I4 and slightly narrower than either of said recesses, thereby providing shoulders l6 which confine a U-shaped bobbin-holding spring 2!! from upward movement. The rear or closed portion of the spring is snugly fitted in the narrower re cess l4 and is retained in position by a cross-pin 22.

with outwardly 24 (Fig. 7) having inwardly 01T- The spring 20 is provided spaced portions set end flanges 25, cut away as indicated at 26 in The spaced side members of the U-shaped spring 25 are provided with upper and lower, in- 40 and 4| (Fig.'

wardly-projecting cam portions 9). When the spindle 30 is in the raised or inoperative position shown in dotted lines in Fig. 2, the shank portion 33 of the spindle overlies and is supported by the upper cam projections 40.-

As the spindle is swung downward, the shank portion 33 engages the projections 40 and spreads the spaced end portions 24 of the spring 20 further apart, to permit entrance of the flange 3.2 onthe spindle 30 and of the flange 42 on the bobbin B between the inwardly offset flanges 25 of: the spring portions 24.

As the spindle reaches its lowered or runningposition, the shank 33 is received in the substan-. tially circular recess 43 (Fig. 3) between the side members of the spring 20 and is yieldingly held by the projections 40 and 4| from either upward or downward displacement. At the same time the end face 44 of the spindle butt or head 34 engages the closed end of the spring 20, as shown in Fig. ,2, thus additionally and accurately determining the running position of the spindle.

The extra depth of the recess l4 allows the spindle head to turn, and the extra width of the recess l2 allows the spring to be expanded sideways by the shank 33.

I have thus provided a construction embodying a pivoted spindle, a bobbin-clamping device, and spindlemositioning means, which entire construction comprises only two parts, namely, a spindle and a U-shaped spring.

I have also provided a construction by which the spindle is firmly held in either raised or lowered position and by which the spring is securely locked in the shuttle blank, all without the use of any additional parts, except the usual crosspin 22. My improved construction is thus extremely simple and economical to manufacture and very reliable in use.

20 and the spindle is pivotally In Fig. I have shown a slight modification in the shape of the holding ends of the spring 59, said ends being provided with a series of grooves 5| to receive a plurality of rings 52 on the butt of a bobbin B of a type commonly used in automatic weft-replenishing looms.

It will be understood that the holding ends of the spring may be otherwise modified to adapt them to use with additional types of bobbins.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a loom shuttle, in combination, a spindle pivoted in said shuttle, and a spindle-holding spring having spaced bobbin-holding arms which are provided with cam portions engaged by said spindle and separating said arms to receive a bobbin as said spindle is moved downward, said arms being released by said spindle to move inward and clamp the bobbin as the spindle reaches its lowered running position and said cam portions being inwardly positioned and yieldingly supporting said spindle when the spindle is in raised position.

2. In a loom shuttle, in combination, a U shaped spindle-holding spring longitudinally and vertically fixed in said shuttle but having spaced bobbin-holding arms yieldingly movable horizontally outward from holding position, a spindle pivotally mounted in said shuttle between the sides of said U-shaped spring near its closed end, and said movable arms having cam projections engaged and forced apart by said spindle as said spindle is moved downward, whereby said arms are spread apart to receive a bobbin placed on said spindle and said cam projections being inwardly positioned and yieldingly supporting said spindle when the spindle is in raised position.

'3. In a loom shuttle, in combination, a U- shaped'spindleholding spring longitudinally and vertically fixed in said shuttle but having spaced bobbin-holding arms yieldingly movable horizontally outward from holding position, a spindle pivotally mounted in said shuttle between the sides of said U-shaped spring near its closed end, and said movable arms having cam projections engaged and forced apart by said spindle to bobbin-receiving position as said spindle is moved downward but substantially free of said spindle when the spindle is in extreme raised or extreme lowered position.

4. In a loom shuttle, a pivoted spindle, a U- shaped spindleholding spring having spaced bobbin-holding arms, and means to secure said spindle and spring in the shuttle, said spindle directly engaging and separating the bobbin-holding arms of said U-shaped spring to receive a bobbin as said spindle is moved from raised to lowered position and said arms being inwardly positioned and yieldingly supporting said spindle when the spindle is in raised position.

5. In a loom shuttle, a pivoted spindle, a U- shaped spindle-holding spring having spaced bobbin-holding arms, and means to secure said spindle and spring in said shuttle, said spindle directly engaging and separating the bobbinholding arms of said U-shaped spring to receive a bobbin as said spindle is moved from raised to lowered position and releasing said arms to clamp said bobbin when said spindle is in lowered running position and said arms being inwardly posiioned and yieldingly supporting said spindle when the spindle is in raised position.

6. In a loom shuttle, a pivoted spindle, a U- shaped spindle-holding spring having spaced bobbin-holding arms, and means to secure said spindle and spring in said shuttle, said spindle directly engaging and separating the bobbinholding arms of said U-shaped spring to receive a bobbin as said spindle is moved from raised to lowered position, and said spring constituting the sole means for holding said spindle selectively in raised or lowered position and for holding said bobbin on said spindle.

7. In a loom, a shuttle having a longitudinal recess, a U-shaped bobbin-holding spring fitting said recess and held from vertical displacement by inwardly projecting flanges above said recess,

a spindle mounted between the sides of said spring, a single means to pivot said spindle in said shuttle and to lock said spring in said recess, cam means on said spring engageable by said spindle and effective to hold said spindle yieldingly in raised or lowered position, and a portion of said spring directly engaging a butt portion of said spindle to accurately determine the lowered running position of said spindle.

PHILIP L. SPENCER. 

